what will happen if we give time parameter both in jobcard as well as step? 2)we had suppose think A is the main progarm and B is subprogram if we give STOP-RUN in sub program what will happen?
There is a link to IBM Manuals on this page. Both of your questions are answered in the appropriate manual (JCL Reference and COBOL Language Reference respectively). Since this forum is not a manual reading service, you should get started reading yourself.